Time Unit Converter

Convert seconds, minutes, hours, days, weeks and years.

Value

Decimal places

From

1 h in minute

60 min

1 h = 60 min

1 h expressed in every time unit.
Unit	Symbol	Value
Nanosecond	ns	3,600,000,000,000
Microsecond	µs	3,600,000,000
Millisecond	ms	3,600,000
Second	s	3,600
Minute	min	60
Hour	h	1
Day	d	0.041667
Week	wk	0.005952
Fortnight	fn	0.002976
Month (average, 30.436875 d)	mo	0.001369
Year (average, 365.2425 d)	yr	0.000114
Decade	dec	0.000011
Century	c	0.000001

What does Time Unit Converter do?

Convert between time units from nanoseconds to centuries, with average month and year lengths clearly stated so long-span conversions are honest about their assumptions.

How to Use Time Unit Converter

1
Enter a durationAny value.
2
Select the unitFrom and to.
3
Read the resultsPlus the composite breakdown.

Key Features

13 units from nanoseconds to centuries
Average month (30.44 days) and year (365.2425 days) stated explicitly
Decimal hours output for payroll
Composite breakdown: any duration as days, hours, minutes and seconds
Every unit shown at once

Frequently Asked Questions

How many seconds are in a day?

86,400 — 24 × 60 × 60. This ignores leap seconds, which are occasionally inserted to keep clocks aligned with the Earth’s rotation and which almost no software accounts for.

How long is a month here?

30.436875 days on average — the Gregorian year divided by twelve. Real months range from 28 to 31 days, so use the date difference calculator when you need calendar-accurate answers.

Why is a year 365.2425 days?

That is the average Gregorian year, accounting for the leap year rules: every four years, except centuries, except every 400 years. The tropical year is about 365.2422 days, so the Gregorian calendar drifts by a day roughly every 3,200 years.